Hi,
I have been trying to draw an image (16-bit color) to a 16-bit color
system, using a call like this:
GdkImage *img = gdk_image_new (GDK_IMAGE_FASTEST, gdk_visual_get_system
(), 640, 482);
img->depth = 16;
img->byte_order = GDK_MSB_FIRST;
img->bpp = 2;
img->bpl = 640*2;
img->mem = buf; /* buf is the pointer to the 16-bit colored data */
gdk_draw_image (some_d_area, gc, img, 0, 0, 0, 0, 640, 482);
however i got a black image. The drawing area is created using
gtk_drawing_area_new().
Do I have to do something extra before I call gdk_draw_image(). I tried
to look into gdkrgb and see how it calls gdk_draw_image for 24/32 bit
color image, but it is too complicate for me right now, and I don't have
a good understanding of gdk_visual and gdk_colormap yet.